I will say this though, DO NOT get a 4S if you have a 4, there is absolutely no point, it's exactly the same phone apart from the Siri feature, which doesn't work very well anyway from all accounts. People will harp on about the better processor etc, etc, the only real upgrade is the camera, but the one on the 4 ain't so bad. Don't let Apple get away with spec bumps in favour of innovation and buy the 4S, it's a disgrace.
Are you really looking at this without bias?? Think about what you just said. 4S has arguably the best smartphone camera right now, bar none. (Nokia N8 was good, but no longer in production.) The processor (A5) is also top notch in that it combines a very good CPU to a very good GPU. And until you play Infiniti Blade 2 (and other A5-optimized game) on it, you won't know what you're really missing with the regular iPhone 4 with A4 chip! Significant upgrade IMO.
Although Siri has issues, you have to remember that it is in BETA. And likely, in the next iOS update, it will only get better and more efficient. And even in just beta, it is still light years ahead of other "virtual assistant" apps. And unlike those apps, Siri is fully integrated into the phone's software...and again, will only get better with every update. Siri is not innovative enough for you??? Come on...step back and look at the bigger picture here! Siri is where the smartphone technology is heading...it is THE future that every major tech company (e.g. IBM) is going after.
About the only things that stay the same for the 4S is the screen size and form factor. Well, Apple has a philosophy that the iPhone is a phone first and foremost...so, the screen cannot be too big where a person can't reach the corners of the screen with one hand. Lets face it, Apple can make big nice screens too...see iPad, but they
choose not to. The next iPhone (5) will have 4" screen max...due to this philosophy. Although small, the Retina screen is quite good.
As for the form factor, the iPhone 4/4S represents the pinnacle of smartphone construction. Even now, there is no other smartphone that is built to the same degree of art and with such high quality material. None. Read this article from an Android fan:
iPhone 4S Up Close and Personal: Hardware - SlashGear So, why fix something that is not broken, right?
Disgrace? Well, not according to consumers nor tech bloggers/reviewers. Lack innovation? Hmm, GN has innovation(s)?? Tell me where.